

<template>
<!-- 顶部安全区 -->
<div class="van-safe-area-top"></div>
  <RouterView />
  <div v-if="tabbarShow">
    <div :style="{'height': `${tabH}px`}"></div>
    <van-tabbar route v-model="active" :fixed="true" active-color="#1baeae" :ref="tabbar">
    <van-tabbar-item icon="home-o" replace to="/home">首页</van-tabbar-item>
    <van-tabbar-item icon="apps-o" replace to="/category">分类</van-tabbar-item>
    <van-tabbar-item icon="cart-o" replace to="/cart">购物车</van-tabbar-item>
    <van-tabbar-item icon="contact" replace to="/my">我的</van-tabbar-item>
  </van-tabbar>
  </div>
  <!-- 底部安全区 -->
<div class="van-safe-area-bottom"></div>
</template>
<script lang="ts">
import { defineComponent, ref, computed } from "vue";
import type {Ref} from 'vue'
import { useRoute } from "vue-router";
export default defineComponent({
  setup() {
    const active:Ref<number> = ref(0);
    let tabDom: any = null;
    const tabbar = (el: any) => {
      tabDom = el;
      tabH.value = tabDom?.$el.clientHeight
    } 
    
    const tabH = ref<Number>(0);

    // 显示隐藏底部导航
    const fnTabbarShow = (name: any):boolean => {
      return ['home', 'category', 'cart', 'my'].includes(name)
    }

    const tabbarShow = computed(() => {
      const route = useRoute()
       return fnTabbarShow(route.name);
    })

    return {
      active,
      tabH,
      tabbarShow,
      tabbar
    }
  }
})
</script>
<style>
@import "@/assets/base.css";
#app {
  max-width: 1280px;
  margin: 0 auto;

  font-weight: normal;
}

header {
  line-height: 1.5;
  max-height: 100vh;
}

.logo {
  display: block;
  margin: 0 auto 2rem;
}

a,
.green {
  text-decoration: none;
  color: hsla(160, 100%, 37%, 1);
  transition: 0.4s;
}

@media (hover: hover) {
  a:hover {
    background-color: hsla(160, 100%, 37%, 0.2);
  }
}

nav {
  width: 100%;
  font-size: 12px;
  text-align: center;
  margin-top: 2rem;
}

nav a.router-link-exact-active {
  color: var(--color-text);
}

nav a.router-link-exact-active:hover {
  background-color: transparent;
}

nav a {
  display: inline-block;
  padding: 0 1rem;
  border-left: 1px solid var(--color-border);
}

nav a:first-of-type {
  border: 0;
}

@media (min-width: 1024px) {
  body {
    display: flex;
    place-items: center;
  }

  #app {
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: 0 2rem;
  }

  header {
    display: flex;
    place-items: center;
    padding-right: calc(var(--section-gap) / 2);
  }

  header .wrapper {
    display: flex;
    place-items: flex-start;
    flex-wrap: wrap;
  }

  .logo {
    margin: 0 2rem 0 0;
  }

  nav {
    text-align: left;
    margin-left: -1rem;
    font-size: 1rem;

    padding: 1rem 0;
    margin-top: 1rem;
  }
}
</style>
